Outdoor high-voltage power circuit breaker

Abstract

The invention concerns an open air high-voltage circuit breaker comprising a circuit breaker unit (13) and a control capacitor connected electrically in parallel to it and surrounded by a common composite isolation housing (7, 8) made essentially of plastic, resting a terminal column (1) fixed to one of its ends. The use of a composite isolation housing saves cost and weight at the upper end of the terminal column and also improves earthquake security.

I claim: 
     
       1. An outdoor high-voltage power circuit breaker, comprising: a pole column including a corner gear casing and having a first longitudinal axis;   a composite insulator housing mounted on the pole column and having a second longitudinal axis, the second longitudinal axis being across the first longitudinal axis, the composite insulator housing being substantially composed of plastic;   an interrupter unit; and   a grading capacitor electrically coupled in parallel to the interrupter unit, the grading capacitor being arranged adjacent and parallel to the interrupter unit, the interrupter unit and the grading capacitor being surrounded by the composite insulator housing and being supported at a first end by the corner gear casing.   
     
     
       2. The outdoor high-voltage power circuit breaker according to claim 1, further comprising: a resistor electrically coupled in parallel to the interrupter unit and arranged in the composite insulator housing.   
     
     
       3. The outdoor high-voltage power circuit breaker according to claim 1, wherein the composite insulator housing includes a fiber-reinforced plastic tube and a silicon shield, the silicon shield being arranged on an outside surface of the tube. 
     
     
       4. The outdoor circuit breaker according to claim 1, wherein the composite insulator housing includes a plastic layer, the plastic layer being arranged on an inside surface of the composite insulator housing.